Question

Which equation represents the graph of the linear function?



A.
y = −2x+ 1

B.
y = −2x − 1

C.
y = 2x + 1

D.
y = 2x − 1

Answer 1

http://static.k12.com/calms_media/media/330000_330500/330014/1/96ea91906e83f413894b3efee43fb26cacfdd503/MS_ALG_S2_01_04_quiz_Q1_question.gif

Answer 2

@Joel_the_boss

Answer 3

@I_Always_Smiling

Answer 4

medal and fan plz!!

Answer 5

if u dont want to give answer plz explain.

Answer 6

The choices are all in the slope-intercept form \(y=mx+b\) where \(m\) is the slope and \(b\) is the y-intercept.

The slope, \(m\), is positive when your line increases going from left to right (i.e. the y-values increase going from left to right).
The slope, \(m\), is negative when your line decreases going from left to right (i.e. the y-values decrease going from left to right).

The y-intercept, \(b\), is the y-value at which the line crosses the y-axis.

Is the slope positive or negative for your line? What is the y-intercept for your line? Knowing these two values will help you answer your question.

Answer 7

i think its b or d

Answer 8

Right, the y-intercept is at the point \(\left(0,-1\right)\), so \(b=-1\).

What about the slope? Is it positive or negative?
Think of the line as the slope of a mountain. If you climb from left to right, are you going up or down? If you are going up, your slope is positive; if you are going down, your slope is negative.

Answer 9

negative

Answer 10

?

Answer 11

Yep! So now you should have your answer.

Answer 12

thx

Answer 13

if i need more help can i call u out?

Answer 14

I'll try my best. There are a bunch of people here who can help as well.

Answer 15

i know but u were the only one that answered.

Answer 16

You've gotta bump your post so it goes to the top (not sure how though). I had to scroll pretty far down to find your post.

Answer 17

Complete the equation of the graphed linear function. Write the slope in decimal form.

y =?x + -1

Answer 18

http://static.k12.com/calms_media/media/1522000_1522500/1522150/1/72228027290231c1fc28ce3670bacc7155cce378/MS_IMC-140829-100652.jpg

Answer 19

The slope, \(m\), is given by
\[\text{Slope} = \frac{rise}{run} =\frac{y_2-y_1}{x_2-x_1}\]
Choose two points \(\left(x_1, y_1\right)\) and \(\left(x_2, y_2\right)\), then plug those values into the equation above to get the slope.

Answer 20

is it 2x-1

Answer 21

Which two points did you use?

Answer 22

0,-1 2,0

Answer 23

Right. So if you plug these two points into the equation I typed above, it should give you
\[Slope = \frac{-1 - 0}{0-2}\]
Which doesn't equal 2.

Answer 24

0.5

Answer 25

Yep! That's your slope.